# TZ0495C

**TST** · Crystals · SMD3225-4P

TZ0495C from TST, in a SMD3225-4P. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN/OUT | passive | Crystal terminal (IN/OUT) per the pin connection table; 26.000000 MHz fundamental, 8 pF load capacitance, 50 ohm max ESR. |
| 2 | GND | power_in | Ground connection per the pin connection table; this pad is a blank mounting pad on the crystal (not connected to the resonator). |
| 3 | IN/OUT | passive | Crystal terminal (IN/OUT) per the pin connection table; 26.000000 MHz fundamental, 8 pF load capacitance, 50 ohm max ESR. |
| 4 | GND | power_in | Ground connection per the pin connection table; this pad is a blank mounting pad on the crystal (not connected to the resonator). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TST |
| Package | SMD3225-4P |
| Category | Crystals/Oscillators/Resonators |
| Pins | 4 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Nominal Frequency |  |  | 26 |  | MHz |  | 3 |
| Frequency Stability over Operating Temperature Range |  | -10 |  | 10 | ppm | referred to the value at 25°C | 3 |
| Frequency Make Tolerance (FL) | FL | -10 |  | 10 | ppm | @ 25°C +/- 3°C | 3 |
| Equivalent Series Resistance (ESR) | ESR |  |  | 50 | Ω |  | 3 |
| Nominal Drive Level |  |  | 50 |  | uW |  | 3 |
| Shunt Capacitance | Co |  | 1.2 |  | pF |  | 3 |
| Motional Capacitance | C1 |  | 4.4 |  | fF |  | 3 |
| Load Capacitance | CL |  | 8 |  | pF |  | 3 |
| Insulation Resistance |  | 500 |  |  | MΩ | DC 100V | 3 |
| Operating Temperature Range |  | -20 |  | 85 | °C |  | 3 |
| Storage Temperature Range |  | -40 |  | 85 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `TZ0495C`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `tz0495c-etched.step` / `tz0495c-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tz0495c.step` / `tz0495c.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [TST datasheet](docs/tz0495c-datasheet.pdf) (7 pp, sha256 `d530658a08527ee4`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tz0495c-datasheet.pdf)